diff --git a/src/Compilers/CSharp/Test/Semantic/Semantics/NullableReferenceTypesTests.cs b/src/Compilers/CSharp/Test/Semantic/Semantics/NullableReferenceTypesTests.cs
index 73abb30737811..fdf78667a9919 100644
--- a/src/Compilers/CSharp/Test/Semantic/Semantics/NullableReferenceTypesTests.cs
+++ b/src/Compilers/CSharp/Test/Semantic/Semantics/NullableReferenceTypesTests.cs
@@ -141900,9 +141900,9 @@ static void M<T>(delegate*<T, void> ptr1, delegate*<T> ptr2)
                 // (7,15): warning CS8600: Converting null literal or possible null value to non-nullable type.
                 //         T t = default;
                 Diagnostic(ErrorCode.WRN_ConvertingNullableToNonNullable, "default").WithLocation(7, 15),
-                // (8,14): warning CS8604: Possible null reference argument for parameter '' in 'delegate*<T, void>'.
+                // (8,14): warning CS8604: Possible null reference argument for parameter 'T' in 'delegate*<T, void>'.
                 //         ptr1(t);
-                Diagnostic(ErrorCode.WRN_NullReferenceArgument, "t").WithArguments("", "delegate*<T, void>").WithLocation(8, 14),
+                Diagnostic(ErrorCode.WRN_NullReferenceArgument, "t").WithArguments("T", "delegate*<T, void>").WithLocation(8, 14),
                 // (9,9): warning CS8602: Dereference of a possibly null reference.
                 //         ptr2().ToString();
                 Diagnostic(ErrorCode.WRN_NullReferenceReceiver, "ptr2()").WithLocation(9, 9)